Phylum Firmicutes, Class Bacilli, Order Lactobacillales, Family Lactobacillaceae, Genus Lactobacillus, [Group A lactobacilli
(obligately homofermentative)], Lactobacillus nasuensis Cai, Pang, Kitahara and Ohkuma, 2012.
Gram-positive, rods (2.9-3.0 x 8.7-9.0 µm) occurring singly or in pairs. Nonmotile.
Colonies on MRS agar were white, convex, smooth and opaque, 7-8 mm in diameter.
Can grow at 10 and 40 ºC, but not at 5 or 45 ºC (optimum 30 ºC). Can grow in NaCl
3%; weak growth in NaCl 6%. Can grow in pH 4.0-8.0. Facultatively anaerobic.
Isolated from silage prepared with Sudan grass.
- Cai Y., Pang H., Kitahara M. and Ohkuma M., 2012. Lactobacillus nasuensis sp. nov., a lactic acid bacterium isolated from silage,
and emended description of the genus Lactobacillus. IJSEM 62, 1140-1144.
Obligately homofermentative (hexoses are fermented almost exclusively to lactic acid
by the Embden-Meyerhof pathway; pentoses or gluconate are not fermented).
Positive results for the fermentation of: L-arabinose (weak), D-fructose, galactose,
2-ketogluconate (weak), D-glucose (acid without gas production), maltose (weak),
raffinose, ribose, N-acetylglucosamine & D-xylose (weak).
Negative results for catalase, fermentation of: adonitol, amygdalin, D-arabinose, D,L-arabitol, arbutin, cellobiose, dulcitol, erythritol,
aesculin, D,L-fucose, gluconate, 5-ketogluconate, glycerol, glycogen, beta-gentiobiose, inositol, inulin, lactose, D-lyxose, mannitol,
mannose, melibiose, melezitose, rhamnose, salicin, sorbitol, sorbose, starch, sucrose, D-tagatose, trehalose, D-turanose, xylitol &
(c) Costin Stoica